As always, best times are Friday and Saturday between 4pm and 8pm. Although some guys start leaving around 7pm and by 8:30pm the place is almost deserted.
Wednesday is usually also a good bet, also from 4pm to 8pm.
Even in slow months (though I'm not really sure they have slow months) these are the times with the highest chance of the most guys being there.
Monday is usually very quiet, Thursday is a bit better but barely. I've never been on a Tuesday and Sunday can go any which way, depending on a lot of factors, though Sundays will usually be less busy than a Friday or Saturday.
